The Audi A8 will be ditching its tried-and-true naturally aspirated 4.2-liter V8 engine for the 2013 model year. Instead, the automaker is fitting its flagship sedan with the twin-turbocharged 4.0-liter V8 that's also being used in the S6 and S7, good for 420 horsepower and 406 pound-feet of torque – increases of 48 hp and 78 lb-ft versus the 4.2-liter model.

When Audi announced the 2013 A8 with the 3.0T V6, it didn't mention fuel economy numbers but did tout the 333-horsepower engine's "great efficiency." According to the United States Environmental Protection Agency, the V6 efficiency exactly matches that of the more powerful 372-horsepower, 4.2-liter V8 – the 3.0T was rated the same 18 city, 28 highway as the naturally aspirated 4.2.

Audi has confirmed at the Detroit Auto Show that its 2013 A8 will be available with a 3.0-liter supercharged V6 in the United States. Delivering 333 horsepower and 325 pound-feet of torque through all four wheels, the A8 3.0T will be sold in both both short- and long-wheelbase formats and it will be one of a growing crop of vehicles sold in North America with start/stop technology. The move follows confirmation that Audi will also market its flagship luxury sedan with a 3.0-liter six-cylinder T

Audi has a hot seller on its hands. If we forced you to guess which model (and didn't let you read the title of this post), you might assume that we'd be talking about the A6 or even the Q5. Nope. The four-ringed automaker is watching its all-new 2011 A8 flagship sedan doing its best impression of hot cakes.

The paint is still drying on the 2011 Audi A8, but the Four-Ring automaker is already ready to roll out its 2012 lineup. A8 fans can now say hello a familiar variant of the flagship sedan which was missing upon launch of the launch of its redesign. The 2012 Audi A8 L will now be offered with a W12 engine under its hood and a $133,500 starting price on the window sticker. For that, you get a dozen cylinders giving 500 horsepower and 463 pound-feet of torque – enough to launch Audi's Big Dad